Earth’s orbit around the Sun is not circular, but an ellipse. The perimeter of Earth’s orbit is roughly 584 million miles ...

With NASA’s fleet of heliophysics spacecraft, scientists monitor our Sun and investigate its influences throughout the solar ...

Earth, sun, moon: three objects in space whose interactions have a pretty big impact on our lives. Earth orbits the sun once ...

The sun's solar weather has caused several atmospheric events since the star entered its maximum phase. See the sun's effect.

Since ancient times, the sun has been known as a giver of light and heat, a source of life. Plants are coaxed from the Earth ...

A sunspot named AR3901 that keeps flinging out M-class solar flares is about to face toward the Earth, putting us in the ...

A 3D map of our cosmic neighborhood has revealed hot and cold regions as well as an "escape tunnel" from our local bubble.

Learn more › After seeing Elon Musk send thousands upon thousands of satellites into low-Earth orbit ... Or even straight into the sun? (You asked. We answered.) Aside from the moral quandaries ...

The full moon this week will be a spectacular Beaver Supermoon—the last in a series of four supermoons this year. Here's how ...

The first photos of earth sent back by the Apollo crews in the 1970s dramatically impressed us that our tiny blue planet ...